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[ Upstream commit88928addee] idxd sub-drivers belong to bus dsa_bus_type. Thus, dsa_bus_type must be registered in dsa bus init before idxd drivers can be registered. But the order is wrong when both idxd and idxd_bus are builtin drivers. In this case, idxd driver is compiled and linked before idxd_bus driver. Since the initcall order is determined by the link order, idxd sub-drivers are registered in idxd initcall before dsa_bus_type is registered in idxd_bus initcall. idxd initcall fails: [ 21.562803] calling idxd_init_module+0x0/0x110 @ 1 [ 21.570761] Driver 'idxd' was unable to register with bus_type 'dsa' because the bus was not initialized. [ 21.586475] initcall idxd_init_module+0x0/0x110 returned -22 after 15717 usecs [ 21.597178] calling dsa_bus_init+0x0/0x20 @ 1 To fix the issue, compile and link idxd_bus driver before idxd driver to ensure the right registration order. Fixes:d9e5481fca("dmaengine: dsa: move dsa_bus_type out of idxd driver to standalone") Reported-by: Michael Prinke <michael.prinke@intel.com> Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Lijun Pan <lijun.pan@intel.com> Tested-by: Lijun Pan <lijun.pan@intel.com> Link: https://lore.kernel.org/r/20230924162232.1409454-1-fenghua.yu@intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
12 lines
331 B
Makefile
12 lines
331 B
Makefile
ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=IDXD
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obj-$(CONFIG_INTEL_IDXD_BUS) += idxd_bus.o
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idxd_bus-y := bus.o
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obj-$(CONFIG_INTEL_IDXD) += idxd.o
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idxd-y := init.o irq.o device.o sysfs.o submit.o dma.o cdev.o
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idxd-$(CONFIG_INTEL_IDXD_PERFMON) += perfmon.o
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obj-$(CONFIG_INTEL_IDXD_COMPAT) += idxd_compat.o
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idxd_compat-y := compat.o
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